Hobi Timber Company 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 14814)

Data from Builder's card for order C-746 from the American Locomotive Company, posted at http://www.longpix.com/ahobi2.jpg, last accessed 5 January 2013. See also "COOK CREEK TREE" at http://washingtonlookouts.weebly.com/grays-harbor-county.html, which describes the highest-from-the-ground fire lookout station in the world. And http://content.lib.washington.edu/cdm4/item_viewer.php?CISOROOT=/clarkkinsey&CISOPTR=1930 and "Excerpt from the Quinault Forest History" presented by the Heritage Research Center at http://www.heritageresearch.com/ourservices/historicalresearch/naturalculturalresources/quinault.html for the brief bio of the HTC.

Hobi Timber Company incorporated in 1922 and successfully gained access to Washington State's Quinault Reservation when it bought 11,300 acres (4,588 ha) in the Cook Creek Unit estimated to hold 305 million board feet of timber. Frank D. Hobi had managed an earlier timber harvester and owned a logging company.

This logging Mogul arrived soon after the timber company began harvesting.

Hobi sold his interests in 1927 to the Corkery Brothers and Arnold Brandis and later logged at Mineral in Lewis County.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID14,814
RailroadHobi Timber Company
Number in Class1
Road Numbers2
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.50 / 3.20
Engine Wheelbase (ft / m)24.83 / 7.57
Ratio of driving wheelbase to overall engine wheebase 0.42
Overall Wheelbase (engine & tender) (ft / m)24.83 / 7.57
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)107,000 / 48,534
Engine Weight (lbs / kg)141,200 / 64,047
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)141,200
Tender Water Capacity (gals / ML)1800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)800 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)59 / 29.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)185 / 12.80
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x610
Tractive Effort (lbs / kg)26,582 / 12057.41
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.03
Heating Ability
Firebox Area (sq ft / m2)118 / 10.96
Grate Area (sq ft / m2)24.70 / 2.29
Evaporative Heating Surface (sq ft / m2)1480 / 137.50
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1480 / 137.50
Evaporative Heating Surface/Cylinder Volume209.38
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4570
Same as above plus superheater percentage4570
Same as above but substitute firebox area for grate area21,830
Power L14154
Power MT256.77

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